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Home Return to list Severe Thunderstorm Warning 0252 Issued by the Davenport / Quad Cities Forecast Office
Action: New Issued At: 2026-08-11 08:34:12
512
WUUS53 KDVN 111333
SVRDVN
ILC015-195-111445-
/O.NEW.KDVN.SV.W.0252.260811T1333Z-260811T1445Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Quad Cities IA/IL
833 AM CDT Tue Aug 11 2026
The National Weather Service in the Quad Cities has issued a
* Severe Thunderstorm Warning for...
Whiteside County in northwestern Illinois...
Southeastern Carroll County in northwestern Illinois...
* Until 945 AM CDT.
* At 832 AM CDT, severe thunderstorms were located along a line
extending from Mississippi Palisades State Park to Andover to
Malone, moving east at 45 mph.
HAZARD...70 mph wind gusts.
SOURCE...Radar indicated. This line of storms has a history of
producing wind damage across portions of eastern Iowa.
IMPACT...Expect considerable tree damage. Damage is likely to
mobile homes, roofs, and outbuildings.
* Locations impacted include...
Sterling, Rock Falls, Morrison, Fulton, Savanna, Prophetstown,
Erie, Garden Plain, Milledgeville, Fairhaven, Tampico, Lyndon,
Sabula, Chadwick, Coleta, Deer Grove, East Clinton, Emerson, Argo
Fay, and Union Grove.
This includes Interstate 88 between mile markers 14 and 44.
This also includes Big Bend Fish and Wildlife Area, Morrison-Rockwood
State Park, and Prophetstown State Park.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Remain alert for a possible tornado! Tornadoes can develop quickly
from severe thunderstorms. If you spot a tornado go at once into the
basement or small central room in a sturdy structure.
For your protection move to an interior room on the lowest floor of a
sturdy building.
This is a DANGEROUS SITUATION. These storms are producing widespread
wind damage across portions of eastern Iowa. SEEK SHELTER NOW inside
a sturdy structure and stay away from windows!
&&
LAT...LON 4159 8963 4159 9016 4163 9016 4164 9017
4165 9016 4166 9018 4178 9020 4190 9015
4196 9016 4200 9014 4206 9017 4210 9016
4203 8969 4193 8969 4193 8963
TIME...MOT...LOC 1332Z 288DEG 40KT 4213 9020 4197 9025 4183 9047
TORNADO...POSSIBLE
THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...OBSERVED
MAX WIND GUST...70 MPH
$$
Uttech
Action: Continued Issued At: 2026-08-11 09:02:13
244
WWUS53 KDVN 111401 RRA
SVSDVN
Severe Weather Statement
National Weather Service Quad Cities IA/IL
901 AM CDT Tue Aug 11 2026
ILC015-195-111445-
/O.CON.KDVN.SV.W.0252.000000T0000Z-260811T1445Z/
Whiteside IL-Carroll IL-
901 AM CDT Tue Aug 11 2026
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 945 AM CDT
FOR WHITESIDE AND SOUTHEASTERN CARROLL COUNTIES...
At 901 AM CDT, severe thunderstorms were located along a line
extending from near Chadwick to White Pigeon to Spring Hill, moving
east at 45 mph.
HAZARD...70 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect considerable tree damage. Damage is likely to mobile
homes, roofs, and outbuildings.
Locations impacted include...
Sterling, Rock Falls, Morrison, Fulton, Prophetstown, Erie, Garden
Plain, Milledgeville, Fairhaven, Tampico, Lyndon, Chadwick, Coleta,
Deer Grove, Emerson, Argo Fay, East Clinton, Union Grove, Ustick, and
Fenton.
This also includes Big Bend Fish and Wildlife Area, Morrison-Rockwood
State Park, and Prophetstown State Park.
This includes Interstate 88 between mile markers 13 and 44.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Remain alert for a possible tornado! Tornadoes can develop quickly
from severe thunderstorms. If you spot a tornado go at once into the
basement or small central room in a sturdy structure.
For your protection move to an interior room on the lowest floor of a
sturdy building.
Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4159 8963 4159 9016 4163 9016 4164 9017
4165 9016 4166 9018 4178 9020 4189 9013
4196 9009 4207 8999 4203 8969 4193 8969
4193 8963
TIME...MOT...LOC 1401Z 287DEG 40KT 4204 8982 4188 8987 4161 9003
TORNADO...POSSIBLE
THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...70 MPH
$$
Uttech
Action: Cancelled Issued At: 2026-08-11 09:22:13
811
WWUS53 KDVN 111421
SVSDVN
Severe Weather Statement
National Weather Service Quad Cities IA/IL
921 AM CDT Tue Aug 11 2026
ILC015-111431-
/O.CAN.KDVN.SV.W.0252.000000T0000Z-260811T1445Z/
Carroll IL-
921 AM CDT Tue Aug 11 2026
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN CARROLL COUNTY IS
CANCELLED...
The storms which prompted the warning have moved out of the warned
area. Therefore, the warning has been cancelled.
A Severe Thunderstorm Watch remains in effect until 200 PM CDT for
northwestern Illinois.
&&
LAT...LON 4159 9001 4193 8975 4193 8963 4159 8963
TIME...MOT...LOC 1421Z 293DEG 44KT 4197 8954 4163 8959 4154 8976
$$
ILC195-111445-
/O.CON.KDVN.SV.W.0252.000000T0000Z-260811T1445Z/
Whiteside IL-
921 AM CDT Tue Aug 11 2026
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 945 AM CDT
FOR EASTERN WHITESIDE COUNTY...
At 921 AM CDT, severe thunderstorms were located along a line
extending from near Polo to near Deer Grove to near New Bedford,
moving southeast at 50 mph.
HAZARD...70 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect considerable tree damage. Damage is likely to mobile
homes, roofs, and outbuildings.
Locations impacted include...
Sterling, Rock Falls, Prophetstown, Tampico, Deer Grove, Emerson,
Yeoward Addition, Whiteside County Airport, Galt, Prophetstown State
Recreation Area, Penrose, Como, Leon Corners, Grimes Addition,
Douglas Park, and Agnew.
This also includes Prophetstown State Park.
This includes Interstate 88 between mile markers 30 and 44.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A tornado watch remains in effect for the warned area. Tornadoes can
develop quickly from severe thunderstorms. Although a tornado is not
immediately likely, if one is spotted act quickly and move to a place
of safety inside a sturdy structure, such as a basement or small
interior room.
For your protection move to an interior room on the lowest floor of a
sturdy building.
Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4159 9001 4193 8975 4193 8963 4159 8963
TIME...MOT...LOC 1421Z 293DEG 44KT 4197 8954 4163 8959 4154 8976
THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...70 MPH
$$
Uttech
Action: Continued Issued At: 2026-08-11 09:22:13
811
WWUS53 KDVN 111421
SVSDVN
Severe Weather Statement
National Weather Service Quad Cities IA/IL
921 AM CDT Tue Aug 11 2026
ILC015-111431-
/O.CAN.KDVN.SV.W.0252.000000T0000Z-260811T1445Z/
Carroll IL-
921 AM CDT Tue Aug 11 2026
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN CARROLL COUNTY IS
CANCELLED...
The storms which prompted the warning have moved out of the warned
area. Therefore, the warning has been cancelled.
A Severe Thunderstorm Watch remains in effect until 200 PM CDT for
northwestern Illinois.
&&
LAT...LON 4159 9001 4193 8975 4193 8963 4159 8963
TIME...MOT...LOC 1421Z 293DEG 44KT 4197 8954 4163 8959 4154 8976
$$
ILC195-111445-
/O.CON.KDVN.SV.W.0252.000000T0000Z-260811T1445Z/
Whiteside IL-
921 AM CDT Tue Aug 11 2026
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 945 AM CDT
FOR EASTERN WHITESIDE COUNTY...
At 921 AM CDT, severe thunderstorms were located along a line
extending from near Polo to near Deer Grove to near New Bedford,
moving southeast at 50 mph.
HAZARD...70 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect considerable tree damage. Damage is likely to mobile
homes, roofs, and outbuildings.
Locations impacted include...
Sterling, Rock Falls, Prophetstown, Tampico, Deer Grove, Emerson,
Yeoward Addition, Whiteside County Airport, Galt, Prophetstown State
Recreation Area, Penrose, Como, Leon Corners, Grimes Addition,
Douglas Park, and Agnew.
This also includes Prophetstown State Park.
This includes Interstate 88 between mile markers 30 and 44.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A tornado watch remains in effect for the warned area. Tornadoes can
develop quickly from severe thunderstorms. Although a tornado is not
immediately likely, if one is spotted act quickly and move to a place
of safety inside a sturdy structure, such as a basement or small
interior room.
For your protection move to an interior room on the lowest floor of a
sturdy building.
Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4159 9001 4193 8975 4193 8963 4159 8963
TIME...MOT...LOC 1421Z 293DEG 44KT 4197 8954 4163 8959 4154 8976
THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...70 MPH
$$
Uttech
Action: Expired Issued At: 2026-08-11 09:38:44 187 WWUS53 KDVN 111438 SVSDVN Severe Weather Statement National Weather Service Quad Cities IA/IL 938 AM CDT Tue Aug 11 2026 ILC195-111448- /O.EXP.KDVN.SV.W.0252.000000T0000Z-260811T1445Z/ Whiteside IL- 938 AM CDT Tue Aug 11 2026 ...THE SEVERE THUNDERSTORM WARNING FOR EASTERN WHITESIDE COUNTY WILL EXPIRE AT 945 AM CDT... The storms which prompted the warning have moved out of the area. Therefore, the warning will be allowed to expire. Gusty winds are still possible. A Severe Thunderstorm Watch remains in effect until 200 PM CDT for northwestern Illinois. && LAT...LON 4159 9001 4193 8975 4193 8963 4159 8963 TIME...MOT...LOC 1438Z 288DEG 40KT 4197 8954 4163 8959 4154 8976 $$ Uttech | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||